Screencast similar software for Windows?

I purchased Telestream's Screencast software to do screen captures before realizing that the screen captures were possible only in Windows. Can you recommend software similar to Screencast that works in Windows?

Try 1AVCapture. It is cheap and it works great. It records the desktop screen, or any other video source you have directly to compressed WMV. It also allows you to do real-time screencasts over the web, and it also records audio alone. I use it and I totally recommend it.